- Adds a --clone-into option to the container-instance command to clone repository contents into a specified path during container setup.
- Fixes the devcontainer-instance sandbox strategy to ensure proper isolation, correct mount permissions, and deterministic behavior across environments.
- Updates related validation and error handling to reflect the new option and sandbox changes.
ISSUES CLOSED: #7555
Implements the four missing protocol methods on DevcontainerHandler required by Epic #825 (ResourceHandler Protocol Completion):
- delete(): uses 'devcontainer exec rm -rf' to delete files/dirs inside the container; returns DeleteResult(success=False) for missing/stopped containers rather than raising.
- list_children(): uses 'devcontainer exec ls -1' to enumerate workspace entries; returns an empty list on container failure.
- diff(): compares content hashes between the devcontainer workspace and another filesystem location; uses EMPTY_CONTENT_HASH sentinel to treat both-absent as no-change.
- create_sandbox(): delegates to BaseResourceHandler.create_sandbox with lazy activation (same DETECTED/STOPPED/FAILED guard as resolve()).
All methods raise ValueError for resources with no location.
Adds 18 Behave BDD scenarios covering success paths, failure/stopped-container paths, empty-path edge cases, and ValueError guards.
ISSUES CLOSED: #1242
Co-authored-by: Jeffrey Phillips Freeman <the@jeffreyfreeman.me>
Co-committed-by: Jeffrey Phillips Freeman <the@jeffreyfreeman.me>
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